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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2014 Susant Sahani <susant@redhat.com>
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <netinet/ether.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <linux/veth.h>
#include "sd-rtnl.h"
#include "networkd-netdev-veth.h"
static int netdev_veth_fill_message_create(NetDev *netdev, sd_rtnl_message *m) {
int r;
assert(netdev);
assert(netdev->ifname);
assert(m);
r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IFNAME, attribute: %s",
strerror(-r));
return r;
}
if (netdev->mac) {
r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_ADDRESS attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA, "veth");
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_open_container(m, VETH_INFO_PEER);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_IPTUN_LINK attribute: %s",
strerror(-r));
return r;
}
if (netdev->ifname_peer) {
r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname_peer);
if (r < 0) {
log_error("Failed to add netlink interface name: %s", strerror(-r));
return r;
}
}
if (netdev->mac_peer) {
r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac_peer);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_ADDRESS attribute: %s",
strerror(-r));
return r;
}
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_INFO_DATA attribute: %s",
strerror(-r));
return r;
}
r = sd_rtnl_message_close_container(m);
if (r < 0) {
log_error_netdev(netdev,
"Could not append IFLA_LINKINFO attribute: %s",
strerror(-r));
return r;
}
return r;
}
static int netdev_veth_verify(NetDev *netdev, const char *filename) {
int r;
assert(netdev);
assert(filename);
if (!netdev->ifname_peer) {
log_warning("Veth NetDev without peer name configured in %s. Ignoring",
filename);
return -EINVAL;
}
if (!netdev->mac_peer) {
r = netdev_get_mac(netdev->ifname_peer, &netdev->mac_peer);
if (r < 0) {
log_warning("Failed to generate predictable MAC address for %s. Ignoring",
netdev->ifname_peer);
return -EINVAL;
}
}
return 0;
}
const NetDevVTable veth_vtable = {
.fill_message_create = netdev_veth_fill_message_create,
.config_verify = netdev_veth_verify,
};
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